From f079ea09eb4b1856ca1dd93d3ab1d5544dd7ee22 Mon Sep 17 00:00:00 2001
From: Winni Neessen <wn@neessen.net>
Date: Sat, 26 Oct 2024 18:29:26 +0200
Subject: [PATCH] Improve BccFromString to handle spaces and empty addresses

Trim spaces from email addresses and skip empty addresses in BccFromString method. This ensures that the BCC list only includes valid, non-empty email addresses, enhancing email sending reliability.
---
 msg.go | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/msg.go b/msg.go
index 587894f..c96bfac 100644
--- a/msg.go
+++ b/msg.go
@@ -942,7 +942,16 @@ func (m *Msg) BccIgnoreInvalid(rcpts ...string) {
 // References:
 //   - https://datatracker.ietf.org/doc/html/rfc5322#section-3.6.3
 func (m *Msg) BccFromString(rcpts string) error {
-	return m.Bcc(strings.Split(rcpts, ",")...)
+	src := strings.Split(rcpts, ",")
+	var dst []string
+	for _, address := range src {
+		address = strings.TrimSpace(address)
+		if address == "" {
+			continue
+		}
+		dst = append(dst, address)
+	}
+	return m.Bcc(dst...)
 }
 
 // ReplyTo sets the "Reply-To" address for the Msg, specifying where replies should be sent.